Irwin 9331ZR Hex Rethreading Die 10-32 Unf Right Hand

Product Description

The IRWIN 9331ZR is a hex rethreading die designed to restore damaged or corroded external threads to their original specification. Built from carbon steel, this die cuts a 10-32 UNF right-hand thread profile, making it a standard tool for field repair work on fasteners, studs, and threaded rods. The 1-inch hex body allows it to be driven with a standard hex die stock or wrench. Trades that regularly service threaded fasteners in tight mechanical assemblies — including HVAC techs, plumbers, and electricians — keep rethreading dies on hand to salvage hardware without full replacement.

This die is suited for field and shop use wherever 10-32 UNF right-hand threads need to be chased or restored. Common applications include restoring threads on machine screws, panel fasteners, and equipment mounting hardware found in residential and light commercial mechanical systems. The compact hex format makes it practical for use in confined spaces where a full round die stock is not feasible.

Key Features

• 10-32 UNF thread size for standard machine screw applications
• Right-hand thread direction for conventional fastener repair
• 1-inch hex body drives with a standard wrench or hex die stock
• Carbon steel construction provides adequate hardness for rethreading mild steel and softer fastener materials
• Compact form factor suitable for use in tight or confined work areas

Compatibility

Designed as an OEM-style replacement hex rethreading die for use with standard 1-inch hex die stocks; suitable for restoring 10-32 UNF right-hand external threads on machine screws and threaded fasteners.

Installation Notes

Rethreading dies are installed and operated by qualified trade professionals or experienced technicians. Before chasing threads on installed hardware, ensure the assembly is de-energized or depressurized as appropriate for the system being serviced. Apply cutting oil to the die and fastener to reduce friction and extend die life. Follow applicable safety practices per NEC, IPC, or IFGC guidelines when working on mechanical or electrical systems.